8-(2a+7)=a+4

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Solution for 8-(2a+7)=a+4 equation:


Simplifying
8 + -1(2a + 7) = a + 4

Reorder the terms:
8 + -1(7 + 2a) = a + 4
8 + (7 * -1 + 2a * -1) = a + 4
8 + (-7 + -2a) = a + 4

Combine like terms: 8 + -7 = 1
1 + -2a = a + 4

Reorder the terms:
1 + -2a = 4 + a

Solving
1 + -2a = 4 + a

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-1a' to each side of the equation.
1 + -2a + -1a = 4 + a + -1a

Combine like terms: -2a + -1a = -3a
1 + -3a = 4 + a + -1a

Combine like terms: a + -1a = 0
1 + -3a = 4 + 0
1 + -3a = 4

Add '-1' to each side of the equation.
1 + -1 + -3a = 4 + -1

Combine like terms: 1 + -1 = 0
0 + -3a = 4 + -1
-3a = 4 + -1

Combine like terms: 4 + -1 = 3
-3a = 3

Divide each side by '-3'.
a = -1

Simplifying
a = -1

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